Abstract
Context: In this study, single-nucleotide polymorphisms (SNPs) were used to investigate kinship for the green sawfish (Pristis zijsron).
Aims: To examine the relatedness of P. zijsron across an expansive coastline in Western Australia.
Methods: Sampling was conducted between the Fitzroy River estuary and Bay of Rest in the eastern Indian Ocean (north-western Australia) between 2003 and 2022. SNPs were generated from tissues collected from 137 live and 1 recently deceased P. zijsron.
Key results: Overall, 62 individual P. zijsron were assigned to 25 litters of full siblings, with litter sizes ranging from 2 to 5 pups, and 76 P. zijsron individuals were assigned to 96 half sibling pairwise relationships. Four pairs of half siblings were captured more than 500 km and born at least 6 years apart, including one pair of neonates captured similar to 870 km and 8 years apart, in the Ashburton River estuary (Pilbara) and Cable Beach (Broome). Furthermore, a pair of full-sibling pups (i.e. young of the year) caught at Cape Keraudren (Pilbara) in 2008 were half siblings of a pup caught in the Ashburton River in 2014.
Conclusions: This study provides evidence of long-distance, likely parental, movement of P. zijsron.
Implications: Dispersal of P. zijsron over large spatial scales indicates that populations could be replenished from elsewhere should they experience a decline, thereby reducing the risk of localised extinction for this species.
Aims: To examine the relatedness of P. zijsron across an expansive coastline in Western Australia.
Methods: Sampling was conducted between the Fitzroy River estuary and Bay of Rest in the eastern Indian Ocean (north-western Australia) between 2003 and 2022. SNPs were generated from tissues collected from 137 live and 1 recently deceased P. zijsron.
Key results: Overall, 62 individual P. zijsron were assigned to 25 litters of full siblings, with litter sizes ranging from 2 to 5 pups, and 76 P. zijsron individuals were assigned to 96 half sibling pairwise relationships. Four pairs of half siblings were captured more than 500 km and born at least 6 years apart, including one pair of neonates captured similar to 870 km and 8 years apart, in the Ashburton River estuary (Pilbara) and Cable Beach (Broome). Furthermore, a pair of full-sibling pups (i.e. young of the year) caught at Cape Keraudren (Pilbara) in 2008 were half siblings of a pup caught in the Ashburton River in 2014.
Conclusions: This study provides evidence of long-distance, likely parental, movement of P. zijsron.
Implications: Dispersal of P. zijsron over large spatial scales indicates that populations could be replenished from elsewhere should they experience a decline, thereby reducing the risk of localised extinction for this species.
Original language | English |
---|---|
Article number | MF24154 |
Pages (from-to) | 1-7 |
Number of pages | 7 |
Journal | Marine and Freshwater Research |
Volume | 75 |
Issue number | 17 |
Early online date | 21 Nov 2024 |
DOIs | |
Publication status | Published - 2024 |
Bibliographical note
Copyright the Author(s) 2024. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.Keywords
- Kimberley
- Pedigree
- Pilbara
- Pristidae
- Rhinopristiformes
- Dispersal
- Reproduction
- Sibship
- Single-nucleotide polymorphism
- dispersal
- sibship
- single-nucleotide polymorphism
- reproduction